Machine for operating upon box



3 Sheets-Sheet l c. D. KNOWLTON.

Filed Nov. 25.

MACHINE FOR OPERATING UPON BOX-'B L ANKS March 27, 1934.

March 27, 1934. c, T N 1,952,172

MACHI-NELFOR OPERATING UPON BOX BLA NKS Filed Nov. 23, 1931. 3-Sheets- Sheet s Fig.

F1816. mam G M 3% Wham Patented Mar. 27, 1934 UNITED STATES MACHINE FOR OPERATING UPON BLANKS BOX- Cutler D Knowlton, Beverly, Mass., assignor to Hoague-Sprague Corporation, Lynn, corporation of Massachusetts Mass., a

Application November 23, 1931, Serial No. 576,781

28 Claims.

The present invention relates to machines for I operating upon blanks which are to be set up as boxes, it being especially concerned with means for bending the blanks at previously formed creases to decrease the resistance to sueceeding bending operations.

In an application for Letters Patent of the United States filed in my name on September 8, 1930 and bearing the Serial No. 480,518, there is disclosed a machine for making creased blanks in a form suitable for setting up to furnish boxes of the type in which pairs of shoes are packed for the retail-trade. The later operations upon the blanks may be of such a character that it is desirable to minimize the resistance to bending the blanks at certain of the creases, as between the end-wings and the end-wing-extensions. An object of my invention is to preliminarily break down at the creases or render portions of the blanks more flaccid and thus readily brought to form without subjecting adjacent portions to undue stresses or requiring special means for their support.

In the attainment of this object, I furnish means for advancing blanks with the extensions,

which are separated by creases from the wings, at the front and rear of said blanks, and combine therewith means for first bending one of the extensions at its crease during the advance of the blanks, and thereafter similarly bending the other extension. In this way, blanks which are traveling with the portions to be operated upon at diiferent points along their path may be subjected to the preliminary bending without delaying their progress. The bending means preferably includes opposite revoluble projections or members, one of which may be yieldable in the general direction of its revolution relatively to another to compensate for difierences in speed. Pairs of opposite co-operating members are shown, each pair contacting with the blank at opposite sides of the creases and having a projection arranged to enter a depression. To adapt the members for operating upon blanks of different sizes and to cause their proper co-operation one with another, their circumferential relation may be varied. In such a utilization as in the blank-making machine previously mentioned, my improved bending means is situated between two pairs of operating rolls, as the pair which cuts blanks from a web, and the succeeding pair, which ejects the finished blanks from the machine. The ejecting rolls are preferably rotated at a greater speed than the cutting-ofi rolls, and the pairs of projecting members contacting with the blanks are arranged to travel at corresponding speeds, to maintain a proper operating relation. In addition to bending a blank-extension out of the plane of the wing to which it is attached, I may employ means for restoring it, as by bending it in the opposite direction. This avoids interference by the flexed extension in succeeding operations. The reverse bending means is shown as carried by the ejecting rolls.

Referring to the disclosure of a special embodiment of my invention as presented inthe accompanying drawings,

Fig. 1 thereof shows in side elevation a portion of a blank-making machine to which the invention is applied;

Fig. 2 is a partial vertical longitudinal section therethrough;

Fig. 3, a similar view with the elements in another relation;

Figs. 4 and 5 are vertical sectional details illustrating, respectively, the straightening efect of the ejecting rolls upon the forward and rear end-wing-extensions;

Fig. 6, an enlarged partial transverse section upon the line VI-VI of Fig. 3;

Figs. 7 and 8, sections upon the line VIII-VIII of Fig. 6, but with the parts disposed as in successive bending operations; and

Fig. 9 is a perspective view of a box-:blank which has been operated on by the first bending rolls of my improved machine.

At 10, in Fig. 1, appears a portion of the delivery-end of the frame of a blank-making machine, there being included three successive operating sections X, Y and Z. Each section has a pair of upper and lower shafts 12, 12 journaled transversely in the frame, the bearings 14 of which shafts may be yieldable, toward each other in the case of section X and from each other as to sections Y and Z, springs 16 providing for this yield. Upon the shafts of sections X, Y and Z are respectively secured pairs of upper and lower carrier members 18,20; 22, 24 and26, 28. While not all cylindrical in form, these members may appropriately be termed rolls. The roll 18 has mounted upon it a knife 30 extending transversely of the frame and acting againstan anvil 32 upon the roll 20 to cut the otherwise formed box-blanks B from a web W, which web may consist of combined shell-material and cover-paper, saidcover-paperbeing at the upperside of theweb. Segmental portions 34 of the rolls 26 and 28 seize from the ejecting rolls 26, 28 with their endwlng-extensions j bent downwardly at somewhat of an angle to the connected end-wings, their resilience having partially restored them to their initial positions. If allowed to remain at such an angle, the extensions might interfere with the later operations on the blanks, as in the setting-up machine. Consequently, I have provided means for returning the flexed extensions to substantially the plane of the blanks. Projecting from the portion of the ejecting roll 26 which is of reduced diameter is a forwardly inclined bar '74 adjustable circumferentially by slot andscrew connections '76. Upon the corresponding surface of the roll 28 is a rearwardly inclined bar 78, of suflicient length, considered radially of the roll, to extend past the end of the bar 74 as the rolls rotate, and a forwardly inclined bar having a beveled end-surface 82. Both these bars may be adjustably connected to the lower roll. The angular relation of the projections furnished by the bar in such that, in the rotation of the rolls, the bars 74 and 78 come into cooperation, while the bar 80 is similarly related to the angular ends 84o'f the segmental portions 34 of the rolls. The advance of the blanks B from the bending rolls 22 and 24 is sotimed that, as the projection 78 rises at the incoming side of the rolls, it engages the leading endwing-extension f and gradually lifts it from its bent-down position appearing in Fig. 9. The endwing c carrying this extension simultaneously receives the contact of the upper projection 74 and is thusheld against displacement. This action of the projections 78 and .74 produces the effect illustrated in Fig. 4, the extension I being bent up past the horizontal. As the projections travel on, releasing the extension, the downward deflection caused by the projections 42 and 64 will have been' largely neutralized and the forward extension of the blank left lying in substantially the plane of the end-wing. This is as appears in Figs. 2 and "3. In a like manner, the rearward extension I is engaged by the projection-surface 82 as. the connected end-wing is held between the co-operating angular portions 84, 84 of the segments 34 upon the rolls 26 and 28, and is bent up to overcome its deflection by the projections 44 and 70. Although the extensions are now alined with the end-wings, the blank-material at the creases h retains its flaccidity. In fact, the reverse bending has increased this, better preparing the blanks for folding in the settirig-up rrachine.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for operating upon box-blanks having wings and extensions separated from said wings by creases, means for advancing the blanks with the extensions at the front and rear of said blanks, and means for bending one of the extensions about its crease during the advance of each blank and thereafter similarly bending the other extension.

2. In a machine for operating upon box-blanks having wings and extensions separated from said wingsby creases, means for advancing the blanks with the extensions at the front and rear of said blanks, and means for bending one of the extensions about its crease during the advance of each blank and thereafter similarly bending the other extension, said bending means including relatively yieldable members.

3. In a machine for operating upon box-blanks having wings and extensions separated from said wings by-creases, means for advancing the blanks with the extensions at the front and rear of said blanks, means for bending one of the extensions about its crease during the advance of each blank, means acting thereafter to bend the other extension at its crease during the advance of said blank, and means arranged to change the circumferential relation of one of the bending means to another.

4. Ina machine for operating upon box-blanks having spaced portions separated by creases, means for advancing the blanks, and pairs of opposite co-operating revoluble bending members, each pair contacting with the blank-portions at opposite sides of the creases during the advance of the blanks.

5. In a machine for operating upon box-blanks having spaced portions separated by creases, means for advancing the blanks, and pairs of opposite co-operating revoluble bending members contacting with the blank-portions during the advance of the blanks, one of said members being yieldable in the general direction of its revolution under the influence of the opposite cooperating member.

6. In a machine for operating upon box-blanks having spaced portions separated by creases, means for advancing the blanks, rotatable carriers, pairs of opposite co-operating bending members mounted upon the carriers, each pair contacting with the blank-portions at opposite sides of the creases during the advance of the blanks, and means arranged to vary the position of-a plurality of the members upon the carriers.

7. In a machine for operating upon box-blanks having spaced portions separated by creases,

means for advancing the blanks, rotatable carthe creases during the advance of the blanks,

and means arranged to vary independently of each other the position of the members upon the carriers at the opposite side of the blanks.

8. In a machine for operating upon box-blanks having spaced portions separated by creases, pairs of bending members contacting successively with opposite sides of the blanks at the creases, and means for moving the contact-surfaces of the pairs of members at difierent speeds.

9. In a machine for operating upon box-blanks having spaced portions separated by creases, pairs of bending members contacting successively with opposite sides of the blanks at the creases, and means for moving the contact-surfaces of the pairs of members at different speeds, one of the members of one pair being arranged to yield under the influence of the opposite member of the pair.

10. In a machine for bending creased blanks, opposite rotatable carriers provided with two pairs of co-operating projections successively acting upon creased portions, each pair of projections being arranged to simultaneously contact with the blanks at opposite sides of the creases, and means for advancing the blanks between the carriers.

11. In a machine for bending creased blanks, opposite rotatable carriers provided with two pairs of co-operating projections successively acting upon creased portions, 2. projection of each pair being provided with an angulardepression and the opposite projection being arranged to enter the depression, and means for advancing the blanks for engagement by the projections and with the creases registering with the projections and depressions.

12. In a machine for bending creased blanks, opposite rotatable carriers provided with two pairs of co-operating projections successively acting upon the creased portions, each pair of projections being arranged to simultaneously contact with the blanks at opposite sides of the creases, a projection of one of the pairs being yieldably mounted upon the carrier, and means for advancing the blanks between the carriers.

13. In a machine for bending blanks, opposite rotatable carriers, one of said carriers having angularly adjustable end-plates and means for securing the plates in different angular positions, a member mounted upon the end-plates for contact with the blanks, and a blank-contact member mounted upon the opposite carrier for cooperation with the member upon the end-plates.

14. In a machine for bending blanks, opposite rotatable carriers, one of said carriers having angularly adjustable end-plates and means for securing the plates in different angular positions, members mounted upon said carrier and upon the end-plates for contact with the blanks, and blank-contact members mounted upon the opposite carrier for co-operation with the members upon the end-plates and upon the associated carrier.

15. In a machine for bending blanks, opposite rotatable carriers, one. of said carriers having angularly adjustable end-plates and means for securing the plates in difierent angular positions, members mounted upon said carrier and upon the end-plates for contact with the blanks, blankcontact members mounted upon the opposite car-- rier for co-operation with the members upon the end-plates and upon the associated carrier, and means arranged tovary the position of the members upon both carriers.

16. In a machine for bending blanks, opposite rotatable carriers. one of said carriers having angularly adjustable end-plates and means for securing the plates in different angular positions, a member pivoted upon the end-plates for contact with the blanks, a spring arranged to force said member toward the carrier, and a blank-contact member mounted upon the opposite carrier for co-operation with the pivoted member.

17. In a machine for operating upon creased blanks, pairs of rotatable rolls spaced from each other and arranged to operate upon the blanks and to advance said blanks, and a pair of rotatable rolls situated between the pairs of operating rolls and having projections extending transversely to the direction of advance, said projecti'ons being arranged to bend the blanks at their creases.

18. In a machine for operating upon creased blanks, pairs of rotatable rolls spaced from each other and arranged to operate upon the blanks, and a pair of rotatable rolls situated between the pairs of operating rolls and having pairs of opposite projections arranged to successively bend the blanks at their creases.

19. In a machine for operating upon creased blanks, a pair of rotatable rolls for cutting off the blanks, a pair of rotatable blank-ejecting rolls, and a pair of rotatable bending rolls situated between the cutting-off and ejecting rolls and contacting with the blanks at the creases.

20. In a machine for operating upon creased blanks, pairs of rotatable rolls spaced from each other and arranged to operate upon the blanks,

means for rotating said rolls at cliflerent peripheral speeds, and a pair of rotatable rolls situated between the pairs of operating rolls and having two pairs of projections successively contacting with the blanks at their creases, the contact-portions of each pair of projections being arranged to travel at substantially the speed of one of the pairs of operating rolls.

21. In a machine for operating upon creased blanks, pairs of rotatable rolls spaced from each other and arranged to operate upon the blanks, means for rotating said rolls at different peripheral speeds, and a pair of rotatable rolls situated between the pairs of operating rolls and having two pairs of projections successively contacting with the blanks at their creases, the contact-portions of each pair of projections being arranged to travel at substantially the speed of one of the pairs of operating rolls, a projection of the pair movable at the greater speed being yieldable upon its roll.

22. In a machine for operating upon creased blanks, a pair of rotatable rolls for cutting off the blanks, a pair of rotatable blank-ejecting rolls, means for rotating the blank-ejecting rolls at a greater peripheral speed than the cutting-off rolls, and a pair of rotatable rolls situated between the cutting-ofi" rolls and ejecting rolls and having pairs of projections successively contacting with the blanks while under the influence of the cutting-off rolls and ejecting rolls, the contact-portions of each pair of projections being arranged to travel at substantially the peripheral speed of the rolls with which it more directly cooperates.

23. In a machine for operating upon boxblanks having a wing and an extension separated from said wing by a crease, means for advancing the blanks, means traveling with the blanks during their advance and acting to bend the extension of each blank about the crease out of the plane of the wing, and means for restoring the extension into substantially the plane of the wing.

24. In a machine for operating upon boxblanks having a wing and an extension separated from said wing by a crease, means for advancing the blanks, opposite revoluble members contacting with the wing and extension in the advance of the blanks to bend said extension about the crease, and opposite revoluble members contacting with the wing and extensions to bend the defiected wing in the opposite direction.

25. In a machine for operating upon boxblanks having spaced portions separated by creases, means for advancing the blanks, pairs of co-operating bending members extending transversely of the path of the blanks and contacting successively therewith at the creases, and pairs of opposite bending members extending across the blanks and acting successively upon them in a direction opposite to the first-mentioned pairs of bending members.

26. In a machine for operating upon creased blanks, a pair of rotatable rolls having means contacting with the opposite sides of a blank at each crease and arranged to bend the blank at such crease, and a pair of rotatable rolls having means arranged to straighten the bent portions at each crease.

27. In a machine for operating upon creased blanks, pairs of rotatable rolls spaced from each other and arranged to operate upon blanks, and a pair of rotatable rolls situated between pairs of operating rolls and having pairs of opposite projections arranged to successively bend blanks at the cutting-0E and ejecting rolls and contacting with the blanks at the creases, and bending means carried by the ejecting rolls and acting in a reverse direction upon the portions deflected by the bending rolls.

CUTLER D. KNOWLTON.

March 27, 1934. A. T. KOPP: 1,952,173

RECIPROCATING CARRIAGE MEcHAuIsM Original Filed Dec. 20. 1924 8 Sheets-Sheet l 

